The brutal, partisan conflict over President Donald Trump’s nomination of Justice Brett Kavanaugh has helped to infect the Supreme Court with Washington’s toxic politics. Now, FRONTLINE reveals how the Kavanaugh clash is the latest battle in a decades long war for control of the Court. Drawing on interviews with senators and other senior officials, the film shows how a deeply felt, 30-year-old grievance drove powerful Republicans to exact revenge by maneuvering to secure conservative control of the Supreme Court—part of a battle that has undermined confidence in one of the most vital institutions in American democracy.